Picking a stablecoin payment processor on listed fee alone is how merchants end up paying close to double what they expected. The sticker rate is one input. Network gas, FX spread on the fiat off-ramp, payout fees, KYC tier, and chain support each move the all-in cost by 30 to 200 basis points. This article puts six processors side by side using their official 2026 pricing pages, then walks through the four hidden cost lines that turn a 1% headline into a 1.8% real take rate. Pricing was pulled from Stripe, Coinbase Commerce, BitPay, Crossmint, Helio, and PayPal PYUSD between April 28 and May 4, 2026.
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The table below pulls processor fee, gas absorption, payout currency, minimum payout, supported chains, and KYC level from each provider's documentation as of May 2026. Numbers are headline rates only. The "true cost" section after the table walks through what gets added on top in practice for a merchant settling weekly to a US bank account.

Sources: Stripe stablecoin payments, Coinbase Commerce, BitPay merchant pricing, Crossmint checkout pricing, Helio merchant pricing, PayPal PYUSD product page. All retrieved May 2026. Confirm with the provider before integrating since published fees move quarterly.
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The processor fee is one of five lines that show up in a merchant's monthly reconciliation. The other four are gas absorption policy, FX spread on fiat conversion, payout fees, and chargeback insurance where it applies. Add them up and a 1% sticker can land between 1.4% and 2.2% all-in, depending on chain choice and payout cadence (rates from Stripe and Coinbase Commerce docs).
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Some processors quote a clean percentage and quietly route the network fee back to the merchant. Coinbase Commerce, for example, charges its 1% on the gross amount the customer sends, but the customer pays gas at checkout, which can push the customer's effective cost up on Ethereum mainnet during congestion. Stripe and Helio absorb gas inside their take rate, so the merchant sees a flat percentage. On Base and Solana, where gas is fractions of a cent, this barely matters. On Ethereum mainnet at 30 gwei, a USDC transfer costs roughly $1 to $3 in gas, which on a $10 invoice is 10 to 30 percent of the transaction.
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Merchants who want USD in their bank account pay a second fee at the conversion step. BitPay quotes a volume-tiered settlement fee (2%/1.5%/1% + $0.25 by monthly volume), but the cross-currency conversion to a non-USD bank account adds a margin set by their banking partner. Coinbase converts USDC to USD at parity inside Coinbase Exchange, then a wire or ACH fee applies. Helio and Crossmint route fiat through MoonPay, Banxa, or a similar partner, which embeds a 1% to 1.5% FX spread on top of the listed processor fee per MoonPay's published rates.
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Wire transfers run $15 to $35 per send across most US business banks. ACH is usually free but takes two to three business days. Stablecoin payouts to a self-custodied wallet cost only the network fee, which on Base or Solana is well under a cent per the Basescan gas tracker. Merchants invoicing $500 a week and settling by wire weekly will pay $60 to $140 a month in payout fees alone, regardless of which processor sits in front (Fed fee schedule and major bank wire pricing).
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Pure stablecoin checkouts have no chargebacks because the transactions are final at chain finality. Card-funded stablecoin checkouts (Crossmint's credit card path, MoonPay-fronted flows) carry standard card chargeback rules, and the processor passes that risk back to the merchant via a higher take rate. Crossmint's pricing page states rates are calculated per transaction depending on card, geography, currency, blockchain, and plan, with card-funded paths typically priced higher than native-crypto paths to absorb chargeback risk; specific percentages are quote-only per Crossmint's pricing page. Native stablecoin payments save the 0.5% to 1% chargeback insurance line that most card networks bake in, per Visa and Mastercard dispute-pricing disclosures.
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For a merchant processing $10,000 a month in stablecoin volume settling to a US bank weekly, the order from cheapest to most expensive among providers with publicly listed rates is Helio (0.75% native), Coinbase Commerce (1% plus customer-borne gas), Stripe (1.5% gas absorbed), PayPal Xoom (1.5% with full PayPal rails), and BitPay (2% + $0.25 at the entry tier; rate drops with volume to 1% + $0.25 above $1M/mo). Crossmint is custom-quoted per Crossmint pricing and depends on plan and volume commitment, so it cannot be slotted on the public-rate ladder without a sales quote. Listed rates from Helio, Coinbase Commerce, BitPay, Stripe, and Xoom.

The cheap-on-paper winner depends on what payout currency the merchant actually needs. A crypto-native operator who keeps USDC on Base or Solana pays Helio's published rates or Crossmint's custom-quoted rate. A merchant who needs USD in a US business bank account every Friday pays Stripe or BitPay rates because the fiat off-ramp is the expensive leg.
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Three patterns dominate in 2026. Stripe and Coinbase Commerce do the conversion in-house using their own exchange or treasury rails, so the merchant gets a quoted USD amount with no FX surprise. BitPay quotes a fixed-rate at checkout and assumes the price risk between checkout and settlement. Crossmint and Helio rely on a third-party partner (MoonPay, Banxa, Bridge) who quotes the rate, so the FX spread shows up in the partner's invoice rather than the processor's, but the merchant still pays it.
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For PYUSD inside PayPal, conversion to USD is at parity. PYUSD is fully reserved 1:1 by Paxos and PayPal redeems it at $1 inside the PayPal wallet per the Paxos PYUSD reserve report. The cost shows up only when leaving PayPal via Xoom or a bank withdrawal. PYUSD circulating supply is currently $3.4 billion per DeFiLlama.
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KYC requirements split processors into two camps. Stripe, BitPay, and PayPal require full business verification (legal entity, EIN, beneficial owners, bank account proof) before processing a single transaction. This is the standard money-services-business profile a US merchant already deals with for card processing.
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Coinbase Commerce, Helio, and Crossmint allow wallet-only setup for receiving and holding USDC. KYC kicks in only when the merchant wants fiat off-ramp. This is a meaningful difference for cross-border merchants, DAO treasuries, or Web3-native businesses where forming a US legal entity for the sole purpose of accepting payment is overkill.
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Chain coverage matters because gas economics live there. Solana and Base settle for fractions of a cent per Basescan and Solscan. Ethereum mainnet routinely costs $1 to $5 for a USDC transfer at moderate congestion per Etherscan gas tracker. A processor that only routes Ethereum mainnet quietly pushes that cost onto the customer or into a higher quoted percentage.
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Stripe supports Ethereum, Solana, Polygon, and Base for USDC. Coinbase Commerce focuses on Base, Ethereum, and Polygon. BitPay has the broadest legacy crypto support. Crossmint covers nine chains including non-EVM (Solana, Aptos, Sui, Cardano). Helio is Solana-first with EVM and Bitcoin added in 2025. PYUSD lives on Ethereum and Solana per the Paxos issuance docs.
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The decision usually collapses to three questions: do you need a US bank payout (Stripe or BitPay), do you want crypto-native treasury (Coinbase Commerce, Helio, Crossmint), and what chain matches your customers (Solana for low-fee retail, Base for an Onchain Summer audience, Ethereum mainnet for institutional). Map those three answers to the comparison table above and the shortlist drops to two or three providers.
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For deeper reading on specific processor matchups, see Coinbase Commerce vs BitPay vs Crossmint compared. For B2B invoicing tools that sit on top of these rails, see Best B2B stablecoin invoicing tools 2026.
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Pricing data was pulled directly from each provider's published documentation between April 28 and May 4, 2026: Stripe Stablecoin Payments, Coinbase Commerce, BitPay merchant pricing, Crossmint checkout pricing, Helio merchant pricing, and the PayPal PYUSD product page. Stablecoin supply context (USDC at $78.1 billion, PYUSD at $3.4 billion) sourced from DeFiLlama on May 4, 2026. Confirm pricing with each provider before integrating because every processor has revised fees at least once in the last 18 months.
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